Janet Street-Porter has claimed she was touched inappropriately by a hairdresser when she was 10 years old.
The broadcaster and journalist was appearing on ITV's Loose Women on a panel to discuss how parents should tackle talking to children about child abuse.
The discussion was prompted by ITV's Exposure documentary that explored claims of sexual abuse made against the late Liberal politician, Sir Clement Freud.
Janet, 69, told the panel that the incident happened during a visit to a hairdresser in London.
She said: "When I was about nine or 10, my mother used to take my sister and I to a hairdresser to have our hair cut.
"This hairdresser touched me in a way that was completely inappropriate. You were kind of in a cubicle and nobody could see. He put his hands down the front of my dress and I just thought, 'This isn't right'."
She recalled telling her mother at the time of the incident, who she said did not believe her.
"Anyway, I went home and told my mother and she immediately said, 'Don't make this up'. She absolutely didn't believe me. She told me off. She went mad at me! She completely told me off."
"Then I said it about another person - a dentist - and she went mad at me again. So I just wonder if that is a generational thing, do you think mums now can talk to their daughters more openly?"
Last week she was awarded a Commander of the Order of the British Empire (CBE) for her services to journalism and broadcasting as part of the 2016 Birthday Honours.
In 2015, model Penny Lancaster broke down on Loose Women as she revealed she was attacked while on her way to school at the age of 12.
Penny, 45, who is married to singer Rod Stewart, fought back tears as she detailed how she had been accosted by a man under a bridge who had lifted up her skirt.